package com.sky.interceptor;

import com.sky.constant.JwtClaimsConstant;
import com.sky.context.BaseContext;
import com.sky.properties.JwtProperties;
import com.sky.utils.JwtUtil;
import io.jsonwebtoken.Claims;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.apache.ibatis.annotations.Param;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * jwt令牌校验的拦截器
 *
 * @Author: Zhy
 * @Date: 2025-01-14 16:59
 * @Version: 1.0
 */
@Component
@Slf4j
@RequiredArgsConstructor
public class JwtTokenAdminInterceptor implements HandlerInterceptor {
	private final JwtProperties jwtProperties;

	/**
	 * 校验jwt
	 *
	 * @param: request
	 * @param: response
	 * @param: handler
	 * @return:
	 */
	@Override
	public boolean preHandle(
		HttpServletRequest request, HttpServletResponse response, Object handler
	) throws Exception {
		// 判断当前拦截到的是Controller的方法还是其他资源
		if (!(handler instanceof HandlerMethod)) {
			// 当前拦截到的不是动态方法，直接放行
			return true;
		}
		// 1、从请求头中获取令牌
		String token = request.getHeader(jwtProperties.getAdminTokenName());
		// 2、校验令牌
		try {
			log.info("jwt校验:{}", token);
			Claims claims = JwtUtil.parseJWT(jwtProperties.getAdminSecretKey(), token);
			Long empId = Long.valueOf(claims.get(JwtClaimsConstant.EMP_ID)
				                          .toString());
			log.info("当前后台员工id：{}", empId);
			// 将当前登录的用户 id 存入线程变量中
			BaseContext.setCurrentId(empId);
			// 3、通过，放行
			return true;
		} catch (Exception ex) {
			// 4、不通过，响应 401 状态码
			response.setStatus(401);
			return false;
		}
	}
}
